Medical Definition of sambucus
1 capitalized : a genus of trees or shrubs of the honeysuckle family (Caprifoliaceae) that bear flat clusters of small white or pink flowers and that include the elderberries
2 : the dried flowers of either of two elderberries (Sambucus canadensis or S. nigra) formerly used especially in the form of an infusion as a mild stimulant, carminative, and diaphoretic but of little medicinal effect
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